/// <inheritdoc />
public override void Decode <TPixel>(TiffPoint offset, TiffSize readSize, TiffPoint destinationOffset, ITiffPixelBufferWriter <TPixel> writer)
{
if (writer is null)
{
throw new ArgumentNullException(nameof(writer));
}
readSize = new TiffSize(Math.Max(0, Math.Min(writer.Width - destinationOffset.X, readSize.Width)), Math.Max(0, Math.Min(writer.Height - destinationOffset.Y, readSize.Height)));
readSize = new TiffSize(Math.Max(0, Math.Min(Width - offset.X, readSize.Width)), Math.Max(0, Math.Min(Height - offset.Y, readSize.Height)));
if (readSize.IsAreaEmpty)
{
return;
}
if (_parameters.ContentSource is null)
{
throw new InvalidOperationException("Failed to acquire ContentSource.");
}
using TiffFileContentReader reader = TiffSyncFileContentSource.WrapReader(_parameters.ContentSource.OpenReader());
var context = new TiffDefaultImageDecoderContext <TPixel>()
{
MemoryPool = _parameters.MemoryPool ?? MemoryPool <byte> .Shared,
CancellationToken = CancellationToken.None,
OperationContext = _parameters.OperationContext,
ContentReader = reader,
SourceImageSize = _parameters.ImageSize,
SourceReadOffset = offset,
ReadSize = readSize,
PixelConverterFactory = _parameters.PixelConverterFactory ?? TiffDefaultPixelConverterFactory.Instance,
DestinationWriter = new TiffPixelBufferWriter <TPixel>(TiffNoopDisposablePixelBufferWriter.Wrap(writer)).Crop(destinationOffset, readSize)
};
_pipeline.RunAsync(context).AsTask().GetAwaiter().GetResult();
}
/// <inheritdoc />
public override async Task DecodeAsync <TPixel>(TiffPoint offset, TiffSize readSize, TiffPoint destinationOffset, ITiffPixelBufferWriter <TPixel> writer, CancellationToken cancellationToken = default)
{
if (writer is null)
{
throw new ArgumentNullException(nameof(writer));
}
readSize = new TiffSize(Math.Max(0, Math.Min(writer.Width - destinationOffset.X, readSize.Width)), Math.Max(0, Math.Min(writer.Height - destinationOffset.Y, readSize.Height)));
readSize = new TiffSize(Math.Max(0, Math.Min(Width - offset.X, readSize.Width)), Math.Max(0, Math.Min(Height - offset.Y, readSize.Height)));
if (readSize.IsAreaEmpty)
{
return;
}
if (_parameters.ContentSource is null)
{
throw new InvalidOperationException("Failed to acquire ContentSource.");
}
TiffFileContentReader reader = await _parameters.ContentSource.OpenReaderAsync(cancellationToken).ConfigureAwait(false);
try
{
var context = new TiffDefaultImageDecoderContext <TPixel>()
{
MemoryPool = _parameters.MemoryPool ?? MemoryPool <byte> .Shared,
CancellationToken = cancellationToken,
OperationContext = _parameters.OperationContext,
ContentReader = reader,
SourceImageSize = _parameters.ImageSize,
SourceReadOffset = offset,
ReadSize = readSize,
PixelConverterFactory = _parameters.PixelConverterFactory ?? TiffDefaultPixelConverterFactory.Instance,
DestinationWriter = new TiffPixelBufferWriter <TPixel>(TiffNoopDisposablePixelBufferWriter.Wrap(writer)).Crop(destinationOffset, readSize)
};
await _pipeline.RunAsync(context).ConfigureAwait(false);
}
finally
{
await reader.DisposeAsync().ConfigureAwait(false);
}
}